it's not so hard to code it.. (I mean dungeons, portal and so on) I made it within two weeks at summer holidays.
But I lost interest.. unfortunately

(the reason why I came here now is I wanted to know if anyone other has succeed..)
I would run it, but I had to download all imgs from playa games (that ***-holes has made some restrictions, so you can't use imgs from their servers on your own server) and host it on my own - but that would make me a lot of problems with copyright..
if I get bored next holidays, I'll try to rewrite the whole piggy-code (yeah, really - it is such a mess, everything in one file and almost in one switch is not as it should be) and maybe share it or hide myself and run it somewhere